INDEX 



717 



Optocoele, 102* See Brain 



Oral cirri of Amphioxus, 45 * 49 



Oral hood-, 45* 



Oral lobes of Doliolum, 27 



Oral siphon, 15, 18 



Orang, 487, 552, 554, 556, 557, 600 



Ora serrata, 110* 



Orbicular, of Rabbit, 455 



Orbit, 76* 



Orbito-sphenoid, 79*, 80 See Skull 



Orai, 480 



Orca gladiator, 500 



Oriental region, 630 



Ornithorhynchus, 478, 489, 492, 493, 516, 

 517, 518, 519, 520, 521, 557, 562, 575, 

 579, 597 



Ornithorhynchus anatinus, 493, 579 



Ornithosauria See Pterosauria 



Orthagoriscm, 232 



Orthoceras, 640 



Orthogenesis, 666* 



Ort-hotomus, 436 



Orycteropodidce, 479 See Cape Ant- 

 eaters 



Orycteroput, 525, 564, (530 



Orycteropua capenxi*, 500 



Os cloaca), 322, 323 



Os cordis, 576* 



Osmerus, 640 



Ossa innominata, 322* 



Ossicula auditus, of Rabbit, 455 



Ossification, centres of, 79 



Osteocranium, 81* 



Osteo-dentine, 85* 



Osteostraci, 262 



Ostracion, 223 



Ostracodermi, 261*, 262, 263, 264 



Ostrich, 411, 421, 422, 430, 432, 435, 436, 

 439, 442, 445 



Otariidce, 484, 506, 599 



Otis, 416 



Otocyst, 25, 30, 35 



Otoliths, 116 



Otters, 484, 505 



Ovarian artery, 92 : vein, 94 



Ovidce, 482, 628 See Sheep 



Ovis aries, 539 



Ovulists, 671* 



Owen, R., 681,686 



Owls, 416, 422, 430, 434, 445 



Oxen, 482, 501, 571, 582, 598 



Oyster-catchers, 416 



_L ^DOGENESIS IN AXOLOTL, 311 



Pachyornis, 430 

 Facinian corpuscles, 107* 

 Paltearctic region, 628 

 Palceohatteria, 371 



VOL. II 



Palceoniscns macropomus, 244 



Palajontological evidence of evolution, 

 646 



Palcaospondylus ganni, 143 



Palamedea, 416 



Palate, hard and soft, 459, 570 



Palatine, 81* See Skull 



Palatine nerve, 105 



Palatine teeth, Holocephali, 191 : Trout, 

 210, &c. 



Palato-pterygoid, 250 



Palato-quadrate, 77*, 80 See Skull 



Palinurus, 621 



Pallas, 674 



Pallium, 103* 



Pancreas, 71, 87* See Digestive system 



Pancreatic juice, 87* 



Pangenesis, 663* 



Panmixia, 655 



Parachordals, 75* 



Paraccele, 100* See Brain 



Paracone, 561* 



Paraconid, 561* 



Paradiseidce, 417, 424, 443, 622 



Parafibula, 524 



Paramyxine, 143 



Paranephrops, 621, 622 



Paraphysis, 102* 



Parapineal eye, 102* 



Parapophyses, 201* 



Paraquadrate, 270* 



Parasphenoid, 80* See Skull 



Pareiosauria, 336 



Parencephalon, 100* See Brain 



Parietal, 79*, 80 See Skull 



Parietal foramen of Stegocephala, 30 



Parietal organ, 102*, 329, 361, 362 



Parietal segment, 80* 



Paroccipital, 450 



Parotic processes, 317 



Parotid gland, 459 



Parotoid glands, 297* 



Parra, 416 



Parrakeets, 416, 430 



Parrots 416, 420, 422, 428, 434, 443 



Partridge, 436 



Parus britannicus, 622 



Parus rosea, 622 



Passeres, 417, 428, 436, 442, 445 



Pasteur, Louis, 686 



Patagium, 506* 516 



Patella, 393 



Patella ulnaris, 430 ^ 



Paunch See Rumen 



Pecarries, 482, 599 



Pecten, of Reptilia, 331, 361 : Pigeon, 

 406 : Birds, 435 



Pectoral arch, of Cranatia, 83, 84* : Dog- 

 fish, 151* : Elasmobranchii, 175 : Trout, 

 209 : Teleostomi, 231 : Ceratodus, 248, 

 249: Frog, 271, 272: Amphibia, 302, 

 303 : Lizard, 320, 321 : Reptilia, 353, 



Y Y 



